Formatting?

Hi all,

Im trying to wipe the HD of an old Dell Dimention XPS ive got running 95 but when i put the boot disk in the only partition is a primary one but its only 2047 mb, the total size is 6150 mb but it will only let me delete the partition and then create one the same size and when i format C: it only formats 2047 mb. How can i format the whole hard drive or create a primary partition of the whole HD? I hope this made some sense?

Thank you